Had I not relied on a certain online retailer who shall remain nameless I wouldn't be in this mess, but here I am.

I've hunted high and low at local retail, but everyone has almost entirely sold out of Wave 4 - thankfully I found the others. Just went to buy one from Little Toy Company and they've just sold out of that one (the rest of the wave they still have in stock).

UPDATE: I've managed to source one! Thank you all for your help; it really is appreciated.